Ventilating apparatus



(No Model.) 3 she e ts -Sheet. I.

G. H. BURROWS.

VENTILATING APPARATUS.

No. 445.878. Patented Feb. 3,1891.

ATTORNEYS THE Mmms vz'rzns cu., PHuTu-urum, WASHINGTON, n. c.

(No Model.) 3 Sheets-Sheet2;

e. H. BURROWS. VENTILATING APPARATUS.

N 0. 445,878. Patented Feb. 3,1891.

LI? K6{ I J 4- J GG I F\r M Z ,1. Q

. d v, i

A. V 1 i J. I I l WITNESSES 4 /T ATTORNEYS m: mam FETzRs coy,FNOTO-LITHO,, \vAsHmuYou, o. c.

(No Model.) 8 3 Sheets-$heet 3.

G. BURROWS.

VENTILATING APPARATUS. No. 445,878. Patented Feb. 8,1891.

UNITED STATES PATENT OFFICE.

GEORGE l-I. BURRO\VS, OF SOMERVILLE, MASSACHUSETTS.

.VENTILATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 445,878, dated February3, 1891.

Application filed June 26, 1890. Serial No. 356,819. (No model.)

To ctZZ whom it may concern:

Be it known that I, GEORGE H. BURROWS, of Somerville, in the county ofMiddlesex and State of Massachusetts, have invented a new and ImprovedVentilating Apparatus, of which the following is a full, clear, andexact description.

My invention relates to improvements in ventilating apparatus; and theobj ect'of my invention is to provide means for taking pure air from anelevation and delivering it in desired quantities into a room or roomseither with or without passing the air through a heater.

My invention will be hereinafter fully described, and specificallypointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a broken side elevation of the device with the air-pumps invertical section.

Fig. 2 is a broken end view with the pumpoperating valves and theconnections between the air supply and delivery pipes shown in verticalsection, and Fig. 3 is a horizontal section on the line 3 3 of Fig. 1.

The expansible air tank or reservoir is constructed on the principle ofa gasometer, it consisting of an outer cylinder or shell A open at thetop, an inner annular partition A and a bell A, closed at the top andopen at the bottom, said bell being adapted to move vertically betweenthe outer shell and the inner partition A The bell A has mounted onopposite sides thereof grooved trucks a, which project slightly beyondthe sides of the frame of the cylinder and run upon the vertical framea, which is adj ustably mounted on the sides of the air-reservoir. Theframe Ct is of an inverted-U shape, and centrally fixed upon the upperpart thereof is a bifurcated lug a in which the walking-beam of thepumps is pivoted. The pump-cylinders B and B are similar in size and arearranged on opposite sides of the air-reservoir. The cylinders are eachprovided with an inner annular partition B and with a bell B closed atthe top, which moves vertically between the cylinders B B and thepartitions B A walking-beam O is centrally pivoted in the log 0, on theframe a, said walking-beam being connected at each end bya rod 0' withthe bell B The rods 0, are of the same length, and it will thus be seenthat when the bell B in the pump-cylinder B is raised the bell in thepump B will be depressed. The bell in the pump B is provided with aweight 0 to enable it to drop quickly after being raised, as hereinafterdescribed.

The pump-cylinders B and B are each provided with upwardly-extendingU-shaped frames 1), said frames being attached to opposite sides of thecylinders, and the bells B are provided with grooved pulleys b", whichfit closely upon the frames, and thus serve as guides for the bells. Thebells B are also provided upon the top with suitable lugsc, to which therods G are attached.

Centrally located in the pump-cylinder B is a vertical pipe D, whichopens through the bottom of the cylinder, Within which pipe andvertically movable in the same is a piston cl, having a suitablepiston-rod 61' connected therewith and extending upwardly to the top ofthe bell B Fixed to the under side of the piston cl is a dependingflexible flange d made, preferably, of rubber, the flange being attachedin such a manner as to give it aninverted-cup shape, as shown in Fig. l.The flange will thus adapt itself to any inequalities in the pipe D, andit will enable the water which enters the pipe to easily raise thepiston A pipe E enters the cylinder B from the bottom and in alignmentwith the pipe D, said pipe E connecting at its outer end with a pipe F,which is arranged at right angles with the same. The pipe ,F has fixedto one end a valve F and to the other a valve F said valves beingsimilar in construction but reversely connected with the pipe. Thevalves F and B have each a horizontal valve-seat with a verticalperforation B through the same. A vertical support f is mounted upon thepipe F, and centrally pivoted upon said support is a walking-beam f,adapted to operate the valves, as described below. The Valves F F areeach provided with a vertically-movable piston f adapted to open andclose the'perforation in the valveseat, the stems of said pistons beingconnected with the screw-threaded rods f which are provided at the topwith slotted framesf adaptedto engage the'walking-beam f. The lower endsof the slotted frames f are screw-threaded to fit the rods f andextending through the top of the frames are screws f so that bymanipulating the framesv and the screws the frames may be adjusted uponthe Walking-beam so as to regulate the stroke of the pistons f A sleeveGis pivoted upon a plate H, which is attached to the pump-cylinder B,said sleeve being in vertical alignment with the support f. The sleeve Gis provided with oppositely-extending arms G and with anupwardlyextending arm G at right angles to said arms. One of the arms Gis connected with one end of the walking-beam f bya rod g, said rodhaving collars g adjustably fixed thereon. The arm G is connected withthe rod g by means of the angled plate g said plate being pivoted to theend of the arm and being mounted loosely 011 the rod g between thecollars g. The plate will thus move upon the rod, and by strikingalternately the collars will actuate the walking-beam f and operate thevalves F Fi The opposite arm G is connected by a chain with a dependingarm 0 which is fixed to the top of the bell 13 which moves in thecylinder B. A weighted rod 9 extends upwardly from the arm G and assistsin tilting the sleeve G and operating the valve mechanism, as describedabove.

A water-supply pipe I extends over the top of the air-reservoir adjacentto the top of the frame a and passes down the side of the res- .ervoirand enters the valve F, and a wastepipe I connects with the oppositevalve F The water-supply pipe is provided with a suitable valve 1 whichis arranged above the air-reservoir, and the valve-stem -ll of saidvalve is provided with a depending lever i, carrying a truck t theweight of the lever and truck being sufficient to turn the valve- ,stemand close the valve. The lever t" is prevented from dropping too far bythe chain 11 which is attached to the lever and to the frame a.

An air-supply pipe J is mounted adjacent to the pumps and air-reservoir, and is adapted to extend upwardly through the top of thebuilding, the pipe being extended sufficiently high to reach pure air,the height of course varying with different localities. The airsupplypipeJ connects with each of the pumpcylinders B and B by a plpe 7, saidpipe opening from the lower portion of the airpipe and entering at thebottom of the cylinders through valves K. The valves K have uponopposite sides up wardly-exten ding studs or screws 7c, which areattached to lugs 7" on opposite sides of the valve, and the top of thevalve is covered by a thin flexible strip said strip being re-enforcedby a thin metallic plate 70". The valve thus operates asacheckvalve,permitting the air to enter the cylin der, but preventing its escape.Each of the cylinders 13 and B is also connected with the air-reservoirA by the pipes L, said pipes opening from. the air-pump cylinders andentering the air-reservoir through valves K, said valves beingconstructed like the valves K, already described.

The delivery-pipe M is arranged opposite to the airsupply pipes J intheair-reservoir, said pipe extending to a point where the air isdelivered, which may be into a room or any number of rooms, or may beinto the air-box of a furnace. The delivery-pipe M is connected with theair-reservoir by a pipe N, said pipe opening from the bottom of theair-reservoir and entering through the bottom of the deliv'erypipe, thesaid pipe N having a reduced end N within the delivery-pipe. Thedelivery-pipe M is also connected with the air-supply pipe J by a pipeM, said pipe entering the delivery-pipe opposite the end N of the pipeN. By arranging the pipes in this manner the air entering the pipe Mfrom the pipe N under pressure will draw into the pipe N largequantities of air from the air-supply pipe J, the pipes operating uponthe air in the same manner that a boiler-injector oper ates upon thewater which is to be forced into a boiler.

partition A and between the cylindersB and B and the partition 13 arefilled with water in order to form an air-tight seal, and the apparatusoperates as follows: The water from the pipe I enters the valve F whenthe pistonf is raised, as shown in Fig. 2. The wa ter then passesthrough the pipe E and into the pipe D and raises the pistond and thebell B" of the pump B. hen this bell B is raised, the air enters thecylinder B through valve K, and the bell B opposite pump B, is depressedby means of the walking-beam connection and the air forced therefrominto the air-reservoir. As the piston (Z nears the end of its stroke,the bell B, by means of the arm 1) and chain g tilts the arms G andsleeve G, thus forcing the rod g and walkingbeam f downwardly andclosing the valve F until the bell A again falls sufficiently to permitarm i to again fall and open the valve 6, and so on indefinitely. Theweight C then forces down the bell B in the pump B, and the water in thepipe D passes out through the pipe E, valve F and waste-pipe I, thepiston in the valve F being raised when the piston in the opposite valveis depressed. When one of the bells I is raised,a vacuum will be createdin the bell B or B, in which the cylinder B is located, so that air willenter the bell through the pipe j, and when the cylinder is depressedthe air will be forced through the pipe L and valve K into theairreservoir A. As the air-reservoir fills, the bell A will be raised bythe pressure of air within, and striking the truck 2' will raise thelever 72 and close the'val've l The pumps will then cease to operateuntil the air in the IIO air-reservoir becomes somewhat exhausted, thuspermitting the bell A to drop, when the weight of the lever t" and truck6 opens the valve I and again sets the pump in opera tion. The weight ofthe bell A is sufficient to give the necessary pressure to the air, soas to force it through the pipe M to the point of delivery.

From the foregoing description it will be seen that a constant supply ofair will be furnished to the air-reservoir, and consequently to the roomor rooms connected therewith, and that one of the pumps will beconstantly in operation, so that the air-reservoir will be very easilysupplied.

In practice the air-supply pipe J may be run to any desired point, so asto obtain a supply of pure air, and the delivery-pipe M may be connectedwith the furnace or may connect directly with the rooms to beventilated. In either-case it will be found that the supply of air isabundant, and the amount of air entering a room or the furnace may beregulated by valves in the usual manner.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. In a ventilating apparatus, the combination, withan air-reservoir and with suitable pumps adapted to fill the same withair, of an air-supply pipe connected with the pumps, an air-deliverypipe, a smaller pipe connected with the air-reservoir and entering thedelivery-pipe, and a pipe connecting with the air-supply pipe andentering the deliverypipe adjacent to the end of said smaller pipe,substantially as described.

2. In a ventilating apparatus, the combination, wit-11 the pump-cylinderB, having a vertical pipe I) centrally located therein, and the bell B",adapted to move in the bell B and having connection with a similarcylinder, as described, of the pipe E, opening through the cylinder Band into the pipe D, the cross-pipe F, connecting with said pipe E, thevalve F, attached to one end of the cross-pipe and to a water-supplypipe, the

valve F attached to the opposite end of the cross-pipe and to awaste-pipe, the walkingbeam f, mounted on the support f, as shown, theverticallymovable valve pistons f adapted to close the valve-seats andadjustably connected with the walking-beam, the three-armed sleeve G,pivoted on the side of cylinder B, the rod g, connecting one arm of thesleeve with the walking-beam f, said rod having collars g thereon, theangle-plate g connecting the rod with an arm G, means, as chain g andbent arm 19 for connecting the opposite arm G with the bell B and theweighted rod g attached to the sleeve-arm G2 and adapted to regulate themovement of the sleeve, substantially as described.

3. A ventilating apparatus comprising an air-reservoir having a bell,said reservoir being provided with an upwardly-extending U- shaped frameconnected by guide-pulleys with the said bell, pump-cylinders located onopposite sides of the reservoir and having vertically-movable bellsmounted therein, a walking-beam pivoted on the reservoir-frame andconnected with the movable bells of the air-pumps, an air-supply pipeconnecting with the air-pump, an air-delivery pipe opening from thereservoir and from the air-supply pipe, avertically-movable pistonmounted in a pipe in one air-pump and connected with the movable bell ofthe pump, a waterpipe opening into the piston-pipe, inlet and outletvalves connected with said pipe, a

lever mechanism for opening and closing the valves by the movement ofthe pumpbells, a Watersupply pipe connected with the inlet-valve, avalve located in the water-supply pipe, and a lever connected with thevalve-stem of the water-supply-pipe valve and extending above the bellof the air-reservoir, so that the movement of said bell will regulatethe water-supply, substantially as described.

GEORGE H. BURROWS. Witnesses:

W. B. HURRUB, WILLIAM P. HAMMOND.

